摘要
为简化星上光调制过程和星间光路由,基于宽带卫星网的特点,利用微波副载波对激光的直接调制,提出了一种新型星上光调制技术方案,建立了系统分析模型,给出了具体的相关实现技术.该方案引入了"目标卫星流"聚合、交换的技术和副载波频率重用的新概念,有效减轻了卫星的处理负荷,提高了系统在微波层和光层对频谱资源的利用效率.仿真结果表明,通过实施波长控制技术和增加光调制指数等措施,可以有效提高系统载噪比.
In order to simplify the optical modulation process and optical routing in satellite networks, a novel scheme was presented using laser modulation directly by microwave sub-carriers based on characteristics of the satellite broadband networks. The system analytic model was set up and the relative technical methods were developed. The converging and switching techniques of 'target-satellite data streams' and a new concept of subcarrier's reuse are introduced which reduce the satellite processing burden dramatically and utilize the network resources on both microwave and wavelength layers with a higher efficiency. The analytic results on system CNR (Carrier-Noise-Rate) and the computer simulation show that the system CNR can be improved greatly by utilizing the wavelength controlling and increasing the optical modulation index.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2004年第5期688-692,共5页
Journal of Shanghai Jiaotong University
基金
国家高技术研究发展计划(863)项目(2002AA712014)
中国科学院"知识创新工程"资助项目
关键词
卫星通信网
星上光调制
目标卫星流
光副载波复用
波长路由
satellite communication networks
laser modulation on satellites
target-satellite data streams
optical subcarrier multiplexed
optical wavelength routing